66006915287296 has 27 divisors (see below), whose sum is σ = 131756250537331. Its totient is φ = 33003392647936.

The previous prime is 66006915287251. The next prime is 66006915287353. The reversal of 66006915287296 is 69278251960066.

The square root of 66006915287296 is 8124464.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 129737535 + ... + 130245313.

Almost surely, 2^{66006915287296} is an apocalyptic number.

66006915287296 is the 8124464-th square number.

It is an amenable number.

66006915287296 is a deficient number, since it is larger than the sum of its proper divisors (65749335250035).

66006915287296 is an frugal number, since it uses more digits than its factorization.

66006915287296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015574 (or 507781 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 67.

The spelling of 66006915287296 in words is "sixty-six trillion, six billion, nine hundred fifteen million, two hundred eighty-seven thousand, two hundred ninety-six".